boostedrides

iTrader: (2)

inop light and brake lights are on. abs is not working and the rear brakes lock up very easy as if they are doing most of the stopping. This is on my 98 z28 m6 car

wrencher

iTrader: (2)

Pull the ABS code (s)..........

z28bryan

iTrader: (7)

What have you done to your brakes so far?

Xsta Z 28

iTrader: (2)

Running stock diameter tires? . . .

libertyforall1776

iTrader: (2)

As wrenched said, get your codes read, but most OBD readers don't do ABS, so you may have to visit a shop. They can provide you a flow chart relating to your code(s) failure(s).

Most likely it's a bad speed sensor (testable by ensuring all sensors report the same wheel speeds), bad ABS motor pack (easy to replace), and/or a sticking caliper...